Old School MapleStory

OSM Boss Organizer

Run management for Horntail and Zakum boss fights. Check in, lock your loot picks before the attempt, then spin the raffle wheel once the boss is dead.


โš” Horntail

Point System

Every player earns points by role. Spend them on raffle tickets for specific drops before the run โ€” one ticket per item slot. Multiple tickets on the same drop go to the wheel.

Class-matching skill books and forced supports earn bonus tickets. Solo tickets auto-win.

View HT rules โ†’

๐Ÿ› Zakum

Open Roll

No points or tickets. Every participant rolls equally on each drop. The organizer maintains a Crystal Exemption List per attempt for recent crystal winners.

Helmet drops are request-based. Everything else is open roll among all eligible players.

View Zakum rules โ†’
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Scheduling & Check-In

Admins schedule runs and post to Discord via webhook. Players check in with their character, class, role, and loot picks โ€” no spreadsheets or DMs.

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Drop Tracking & Stats

Drops are spun on the in-browser raffle wheel and recorded on the spot. The stats page tracks drop counts, raider participation, and full run history by boss.

๐ŸŽก

Free-Use Wheel

Standalone name picker โ€” enter any names, spin, get a result. Use it for anything.

Open โ†’

OSM Boss Organizer ยท osm-bossing.pro